<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>02表头单元格标签</title>
</head>
<body>
    <h1>班级名单</h1>
    <table>
       <tr>
        <th>姓名</th>
        <th>年龄</th>
        <th>性别</th>
       </tr>
       <tr>
        <td>张三</td>
        <td>18</td>
        <td>男</td>
       </tr>
       <tr>
        <td>小红</td>
        <td>19</td>
        <td>女</td>
       </tr>
    </table>
</body>
</html>